Datasheet

LTC3417A-2
4
3417a2fa
OUT1 Burst Mode Operation
OUT1 Pulse Skipping
Mode Operation
OUT1 Forced Continuous
Mode Operation
OUT2 Burst Mode Operation
OUT2 Pulse Skipping
Mode Operation
OUT2 Forced Continuous
Mode Operation
ELECTRICAL CHARACTERISTICS
TYPICAL PERFORMANCE CHARACTERISTICS
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: The LTC3417AE-2 is guaranteed to meet specifi ed performance
from 0°C to 85°C. Specifi cations over the –40°C to 85°C operating
ambient temperature range are assured by design, characterization
and correlation with statistical process controls. The LTC3417AI-2 is
guaranteed to meet performance specifi cations over the –40°C to 125°C
operating temperature range.
Note 3: The LTC3417A-2 is tested in feedback loop which servos V
FB1
to
the midpoint for the error amplifi er (V
ITH1
= 0.6V) and V
FB2
to the midpoint
for the error amplifi er (V
ITH2
= 0.6V).
Note 4: Total supply current is higher due to the internal gate charge being
delivered at the switching frequency.
Note 5: Switch on-resistance is guaranteed by design and test correlation
on the DHC package and by fi nal test correlation on the FE package.
Note 6: Variable frequency operation with resistor is guaranteed by design
but not production tested and is subject to duty cycle limitations.
Note 7: This IC includes overtemperature protection that is intended
to protect the device during momentary overload conditions. Junction
temperature will exceed 125°C when overtemperature protection is active.
Continuous operation above the specifi ed maximum operating junction
temperature may impair device reliability.
Note 8: T
J
is calculated from the ambient temperature, T
A
, and power
dissipation, P
D
, according to the following formula:
LTC3417AEDHC-2: T
J
= T
A
+ (P
D
• 43°C/W)
LTC3417AEFE-2: T
J
= T
A
+ (P
D
• 38°C/W)
3417A-2 G01
V
IN
= 3.6V
V
OUT
= 1.8V
I
LOAD
= 100mA
REFER TO FIGURE 4
I
L
250mA/DIV
V
OUT
20mV/DIV
2µs/DIV
3417A-2 G02
V
IN
= 3.6V
V
OUT
= 1.8V
I
LOAD
= 100mA
REFER TO FIGURE 4
I
L
250mA/DIV
V
OUT
20mV/DIV
2µs/DIV
3417A-2 G03
V
IN
= 3.6V
V
OUT
= 1.8V
I
LOAD
= 100mA
REFER TO FIGURE 4
I
L
250mA/DIV
V
OUT
20mV/DIV
2µs/DIV
3417A-2 G04
V
IN
= 3.6V
V
OUT
= 2.5V
I
LOAD
= 60mA
REFER TO FIGURE 4
I
L
250mA/DIV
V
OUT
20mV/DIV
2µs/DIV
3417A-2 G05
V
IN
= 3.6V
V
OUT
= 2.5V
I
LOAD
= 60mA
REFER TO FIGURE 4
I
L
250mA/DIV
V
OUT
20mV/DIV
2µs/DIV
3417A-2 G06
V
IN
= 3.6V
V
OUT
= 2.5V
I
LOAD
= 60mA
REFER TO FIGURE 4
I
L
250mA/DIV
V
OUT
20mV/DIV
2µs/DIV